Mountain Biking - What's a rim?

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hooligan
08-25-04, 12:26 PM
I thought it was the wheel? Then I check images up and they are lil C shape things! What the heck are they and can you show me where they are on a bike?
kona_roastbika
08-25-04, 12:29 PM
a rim is the same thing as a wheel i think :S
hooligan
08-25-04, 12:29 PM
Okay I saw the pics and now I see that's how the rim's design is. Now..how do you put the spokes on the rims?
kona_roastbika
08-25-04, 12:31 PM
get a professional to do it you have to lace it which is time consuming just bring it to a local bike shop.
geoduck
08-25-04, 02:45 PM
The 'C' shaped thing of which you speak is a cross section of a bicycle rim. The tire mounts in the open part of the 'C'. :rolleyes:
A wheel is made of several parts. The hub (the bit in the middle that clamps into your frame). The spokes (the wires that connect the hub to the rim)... Which is the aluminium (steel on really old bikes) hoop thingy with holes aound it to attach the spokes. Inner tubes and tyres are optional but make the whole cycling experience that bit more comfortable :).
Inner tubes and tyres are optional but make the whole cycling experience that bit more comfortable :).
And don't forget the air (yes, I know about solid rubber tyres but those are for the delusional :D). I mean if you're going to go to the effort of using tubes and tyres, you may as well go all the way. :p
ROFL - I forgot the air - DOH :) !
catatonic
08-26-04, 08:25 PM
Yeah the wheel starts out as a hub, which is basically a solid or hollow (quick-release type) axle attatched to a solid member via some bearings. These bearings are what allows the wheel to turn, and is where most of the cost of a hub is.
Next up you have the Rim, which is that C-shaped ring you were talking about. notice how the hub and the rim have a certain number of holes in them? You need this number to match. The reason for this is the spokes lace through the hub and are attatched to this rim via "spoke nipples".
Once this is done, some rim tape is applied in the bottom of the c-channel over the tops of the spoke nipples...this is to protect the inner tube from punturing on the nipple heads (they are often screwheads). Then your tire and innertube go onto this finished assembly.
Given the task of making the wheel stright is where all your difficulty really is. lacing it is pretty otugh in of itself though, you have to be very consistant in your work and if you leave it, it may be very hard to get the job done right.
Joe Gardner
08-27-04, 08:24 AM
Let's try to keep this on topic guys, you can find all your off topic posts here: http://www.bikeforums.net/showthread.php?t=63694
cryptid01
08-27-04, 09:12 AM
From Merriam-Webster:
Rim: the outer part of a wheel joined to the hub usually by spokes.
Hope this helps.
hooligan
08-27-04, 02:46 PM
I knew that. Don't be sarcastic. I was just asking about hte strange C shape thing which I now know is the rim's cross section.
cryptid01
08-27-04, 05:08 PM
Oh, okay, sorry about that. :p
I didn't know your question had already been answered. :)
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